It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://mit-edu-9503416287-gov.caltech-edu.pp.ua/post/9503416287

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "mit-edu-9503416287-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910fecb63da76fce',cH: '70Rlp6FNltq7HinTd3MNAoXTCyhccrm0d3VCklvnGEQ-1739398393-1.2.1.1-gOpXg7oYs_aWKx.Pw5JyxKZovNA3ZHnwDkMp_5ve9QUJTV5X0lG7neA98s8CCmOO',cUPMDTk: "\/post\/9503416287?__cf_chl_tk=ngTLpZoAMgnqr6rZHBlcstlb3CGGbY6AZu_ERetE3GA-1739398393-1.0.1.1-5g8WdL5YpgT9Raiagj6jDbUXNq3YnUKdzk3Jg0clTAE",cFPWv: 'b',cITimeS: '1739398393',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9503416287?__cf_chl_f_tk=ngTLpZoAMgnqr6rZHBlcstlb3CGGbY6AZu_ERetE3GA-1739398393-1.0.1.1-5g8WdL5YpgT9Raiagj6jDbUXNq3YnUKdzk3Jg0clTAE",md: "6sYFWTviaosmossFel8qIrCyVm.BYfRqUDB1mg.1X0U-1739398393-1.2.1.1-G1z7lp1UU36C34n5HGOGfQJSuuBnomWo0Hhvw39enEI0Ga8TS7kr4v5Utg7OK_OsZOluAOb9ETz.NHS0Mrsl1OG25I6SOTmB17pAE6TN1iHYrO1LBX3gfcQ0xf.Eb2ZZwgbpL8VXzkuilrx0e_xIqIL1nFPEiI2GPTzJCMD6jJN4sSGgpGxIU9ycJuaE4MLZfMOhPqYG9wGDYN0eKMWaVLex3N.M83XM3LybdAKl1KggTT.Er4uAgAYm.2fJBdpSxTQcdoE5BcRxA0ul.B1T7LwHGw0GTW3wDtNDe6Wd79MBLwJr9fBWZJZuDiHPb8gJezhHavJEcuTHxfceeqzHAWbt82JHL5lYep7nmmZmfBR3qqv8dX_hUbenG31F5SWYpSVF7R6lnQ3kQMLowd4d3AaZHABY4QMjec3PRVZytv.8oVvsZyHrsRX6P_DCmqYURJne5PO1nxQWLsFlE7Hu_FqbzCuen6vHfe0T2o9DEIBMuX4bxkq51wC0QwFgxj0HvQvC9w7S_lPYNHuRg7oqNIn9nbz.gZ3dnhi59lYCEh4ejgHFGRcVHoPmiDA2RbhbB.I_T_5m4T_lvcVOMovHsHCuoxF6018Sog8eQCvLB_O1.3NBhcj9s4iqfwWRoNNs0tM.jqD3EP8Y.PwVF.egduM5a0ziJ5KOu8Lu_MvUcEOUftZLrJ9BSOB4l9kWq2DcXol1m6hO6wZ.0J8wBS9Pq.nAFtNbuBvDk5vTv3YBaCyAJ_Ss3Q546V1o5V4k.UjctuLxcks_bScE5f7ZiouQhegHdtHS9Nf.s2fVB9zZF0flOSho7V99Oa6mbzJzWhdbYEqxrcq_nV784J.BrNCnvhBLDgWioeeTMOY_nliN0pffDOjFGrDaLb58azrCPRLQhBwWIEjJNdoRADjkZf54OnN.2kuexHlI.i52vjqZ0kAMzi_upA5NLB94gj_BfovevjeeVGA3bFrxXqFoVYuObJXnIssfIKu9gHNRxqsbMvKjnY3gHorVv3o84FYi4kNkEf_diS4Tk9u85_3xNZdj4LpVKRYmJXDROCTAfbjKSHIs5Fn2U8UdYWsbHXLMYNwgrhnQREmfgKDyJrshFWbW6GkKX4jXKpEocEEBYrEfnINzKrGJGT9XnvaxsfDTAMkCPw5V4nWH4LOnsPknDJOYeSLJzL5fcOQ.2tQGFdJu8XtQA5ryGCu7aMft9EL_N5wyp0dABbQwf_bgebOFpQM8gFvmts_VQiFECmy3hlV9Xf7acG7ZSgfX5aJu2TJHvna8fUEx3bl75kS_oPyKiYyKA7.1NnPWw0gZt3ijQWR1GG0aYFnoOVTFyYiijORzKjX0Ag4pFOHywTqHTbXWjwMpWGfOxFZw3AClcJE0N1niXniJ0QwQlR6b6a76FwrM4A3.4G.6lQr6lRoLZ8A8Auv5EUf5hyiaW3eaL9ByqJ_TjBNzfjHfVXscbm6IUMekWTp7XNxY6z5jUlyqvNlv4KHHcVNC6tI5SstR0rFVaAlWp9YAThJjV5V5p7Dm1SDAlwxzLJBImTWA0aCTy4ylohrXgrnysbECM8BQU9fSmkSjPxW8JUokD08ZOjo5pxI93GPzVlsBs7EVijNU_rbt_TkiBT9AWzBeTWBuKNorBnKh6hbl5pPEHJLeoD5BU1ZiBroeHNOFRON1uvd67.XfRTkAW4y0S.y8_3GEmrZQUOYEfZnm7GZtQvoy1av_6mordeYHw9BGZXPDpRDLSbrcAaR8QAImxJRr83zFW4F7pHx9LpaCfV6AeWGBXJlHi4xiqguwVgvoeZ_MRxBhcsxgKvM5bdblQ9oFKZvFSmQanLvo5G3dlnvTHnWEB6JJ5_4lTNDZSK7vQK.rlTC6G1baTnSuEA7rPDr6KuqVETaeZ8wn6WyH0KKKrLqosjUa3R._mENxnRzyq3utt6pvKsZ2.nE5lMV1tVIEG_vebJ6YNdh6dVj_ah9AfBjo1GeLyXxl8ZRN3CR.sp86.3G.uvO.REQz_yDXZFIBI.pr_z10zRhG0MQD27MdvSyC5vWoT0omeEHuKUV7Mwp7ObwkLbg5TRNhJbJhLgSodl6JmZimY4wdhkBfdw.SALDGXxADX0L7Jsk_VXImrSfyBhRLzlKec56CebiKxRc3B3QFCe120AN11GNU07vMjAlnA75ZJ2OgObNdNcXnTbGBEgC2ZjDhbA9QLVnsccOOoRVBvSzwE_ZG7bsYIHN8Z6T5e.lJ5H8yTqJJMoC1nRv7gWXOJRQAIZ3COw",mdrd: "n8LkxoEZ0l5rVEk.s20G3wsKyoi_0z1gvvcpET12fHs-1739398393-1.2.1.1-SUznv3naTn0OD8dBd_fbYyDOuOjavKIAvfMcsQVWmOEYrTazcRMMyFyP4pygvc5OhxNusNYyjGXgsIcWFYBZsKcQaIOw9Y9.ZVF3cT_XptnxkqAsh3.jcIhqsGK5v0iSZEVZs.iyfXJeC30tEURZTaddGQ6snjy13lFFJd59fYBTrv1sKO_3ZPhoKYJk.jHOkxu_MCZZN2y3CWmP5oLSl4AeLgvUQLCI5JumGbvR4_8RJW11x8ozOyyZT2rR8oyXp09wEoYNC2u.aVnFCxIIpeC4qDvuWDXaBtkXRC3WIZmBmxBNTq6G4wlNvtp8dMcHE8xcoxTBnXj42ilbSp6BqzV_sJni1QBwwqgMELTB_JDx7eiuRlCcmDB0sN8lUEaZQIHe97LGOYIFfyiKxQdAIRb8r4NYr1QxesLYHK_bv6.GO8P0l.z4UpVRf6R96r0uvgfYgu7WzaUto4DMCrfm5uuORYZBhybBRTms64AvVgX2VOrZ4_PgQl4trc04S1r4Q4OksCWiNHd6ZQKYRBQ6DhjjzBGMQ90MnY9ffjEEFiAMEWt9BS7HUwMt.ULXPMEf02mnO_J.T4e66NzyVYAUvy7NowKulcMxzLNJ5VEfeIErH2iGINHCXhQLGWr969qckgYpFqpGVPUq9Prh3OdRrdOCtOZHbTmWtIL2nlfqVoW80TQ122SSXgTo7pM.RD3vPcn8Qe0ay.4pCLZfS_pejnpc_w5JcxNv0mwMY37rvdbgP4AQ5PK6_wEw1ME1WOJ9uznrXXwtoZiACMLp_CCGtrHjdjrulaOAV_WzEz3tJITZrOUW_ewqVCIbyhu_ypBTOgPfTtjCxqgSJ0fn7lcrC.BZQt2XstgwmMg8hD0qz8IwqO_5IEX3jxZ72TMe8CeKyvXxTS1nOThpHKLi4oXrYPhqhgDlQLNRGEVJI1TgFpAug0ZacHxq4HuEzjx1.e9NyE1Yll0K.4PDNfF.mI2fnxmPCbPjYF8XU60TGUVBZINAnGRdG_BLuxCf5MGuvU_aX2i61i__PwKUFx0pCabYUIObEBI9rS5_Jwkyr1hkQ72TPzv4fyqHl5ja5fnmZ1URod_dZAu4aY..F0DZxsnNFrcF6CjZGSOCPJaYn0H7XKnu6gxkmtsO7VUmDG2GXegs4qs7JbVfBmE2e_4WXvKKMa6bl93rQKKbltRYww.XTUb6tiJ4jwFLZp7zW7mN.5Qq3BABi09XyIB8CsewKcE1I6lycksah4T9rOwRdv4gl8vbF0WpHBZCv1S94JyC8zE82vlvSCEWntefgF_Yq40cVI.zri0TPX8SuHsTacz6kPSfWQXx_XCs06W5DrrXHlpZgiL__PG6PRolnNtGyPaYfIETXFv3uuUO50xuvT9ZinGBSNTBZbJHgq65.8giE7blCO9bHoL9OXjWg7xFBfWLKiOk9PmwCcbU.uJx8BZbiTggmVOP4N4u21Or0B9Gd.TjW_C8wQ4Lg5XhPYtfht7xiyP.kQWKgfWU1KNWSx5ynm6FRszg7R78we6.BRwnoNlTLcvS818xYHg7bCkRQDnxDGUUINJ5Ein.pBJqbW2gTK7iGuEH1z3mII40oFPmgPhE7hXJzK335DED8YQrhf0Ni0PYd.n6VUf8Ln.NTH8Un.JmIY.ld3cArIYdBWkqlI_CQAu4YKVy8GUdI3OupQKO4WPRb8564MPX3dYb_tY_MmJ5VHJg8Kbm1uoRbWR46mc2MC3H5IErQ3vmOqxxLSCjhq_CduQ6foMqLCx35Va5q_QA_yGlFkmzUzZZkV2iuwj6iuL0Jnlh_kAgcOrfCJzM3u.aBg2ZH_E62tf9gkSyyizJT83_1xG_EtQo80fwI7Wn"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=910fecb63da76fce';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/post\/9503416287?__cf_chl_rt_tk=ngTLpZoAMgnqr6rZHBlcstlb3CGGbY6AZu_ERetE3GA-1739398393-1.0.1.1-5g8WdL5YpgT9Raiagj6jDbUXNq3YnUKdzk3Jg0clTAE" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda